
So Michan died in that accident and the asshole is using his body as a vessel?

Nah, his crazy ass is using the kid as a vessel. The whole thing where he was talking about the 3 types of souls and yada yada yada basically summed up to
The kid and Uke are both vessels he prepared
uke is made up of fragmented part of the other guys soul who he's trying to bring back, Seoho, while the kid is supposed to be the new body in which he would transfer Seoho's soul to after he has dismantled Minchan's and take what he deems as part of Seoho's soul.
He can't cope with loss or the fact that the "vessels" he made grew into their own persons
so he is using the excuse that "technically" #-.-) Minchan is Seoho as a justification for going batshit crazy, basically killing not one but TWO individuals
I love how He Tian always is showing that Mo is his man